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Step * 1 of Lemma strong-subtype-union-base


1. A : Type
⊢ strong-subtype(A;A ⋃ Base)
BY
{ (BLemma `strong-subtype-b-union-better`⋅ THEN Auto THEN BLemma `strong-subtype-isect-base` THEN Auto)⋅ }

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Latex:

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Latex:

1.  A  :  Type
\mvdash{}  strong-subtype(A;A  \mcup{}  Base)


By

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Latex:
(BLemma  `strong-subtype-b-union-better`\mcdot{}
  THEN  Auto
  THEN  BLemma  `strong-subtype-isect-base`
  THEN  Auto)\mcdot{}

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